Did you know that there are two types of tomato leaves? There are Regular leaf (RL) tomatoes and there are Potato leaf (PL) tomatoes. This picture above is one of my Japanese Black Trifele tomato seedlings, and you can see here quite clearly that it is not like other tomato plants. A little research on the internet shows that there are many hundreds of tomato varieties which have potato leaves. Big Boy and Brandywine are two with which I am familiar. There are lots more out there.